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Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate.
Colloids Surf B Biointerfaces. 2010 Mar 01; 76(1):340-5.CS

Abstract

Glassy carbon electrode modified with gold nanoparticles was prepared using electrodeposition at constant potential of -0.20V, and characterized with scanning electron microscopy and electrochemical techniques. Voltammetry was employed to study the electrochemical behaviors of tryptophan at the Au nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. The results showed that the Au nanoparticles modified electrode had good performance for the electrochemical oxidation of tryptophan. Compared with the unmodified electrode, the Au nanoparticles modified electrode improved the adsorption of tryptophan on the nanointerface and amplified its current response. The oxidation peak potential showed a negative shift of 50mV in the presence of sodium dodecylbenzene sulfonate indicating that the electron transfer between the electrode and bulk solution of tryptophan was facilitated. Experimental parameters for tryptophan determination, such as deposition time, pH value, and accumulation conditions have been optimized. The oxidation peak current was linearly dependent on the tryptophan concentration and a calibration curve was obtained in the concentration range of 9.0x10(-8)molL(-1) to 5.0x10(-5)molL(-1) with detection limit of 8.0x10(-8)molL(-1) (S/N=3).

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Authors+Show Affiliations

Li C
Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, China. lcychem@yahoo.com
Ya Y
No affiliation info available
Zhan G
No affiliation info available

MeSH

BenzenesulfonatesElectrochemistryElectrodesGoldHydrogen-Ion ConcentrationMetal NanoparticlesMicroscopy, Electron, ScanningOxidation-ReductionSurface-Active AgentsTryptophan

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20015621

Citation

Li, Chunya, et al. "Electrochemical Investigation of Tryptophan at Gold Nanoparticles Modified Electrode in the Presence of Sodium Dodecylbenzene Sulfonate." Colloids and Surfaces. B, Biointerfaces, vol. 76, no. 1, 2010, pp. 340-5.
Li C, Ya Y, Zhan G. Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. Colloids Surf B Biointerfaces. 2010;76(1):340-5.
Li, C., Ya, Y., & Zhan, G. (2010). Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. Colloids and Surfaces. B, Biointerfaces, 76(1), 340-5. https://doi.org/10.1016/j.colsurfb.2009.11.017
Li C, Ya Y, Zhan G. Electrochemical Investigation of Tryptophan at Gold Nanoparticles Modified Electrode in the Presence of Sodium Dodecylbenzene Sulfonate. Colloids Surf B Biointerfaces. 2010 Mar 1;76(1):340-5. PubMed PMID: 20015621.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. AU - Li,Chunya, AU - Ya,Yu, AU - Zhan,Guoqing, Y1 - 2009/11/27/ PY - 2009/06/13/received PY - 2009/11/23/revised PY - 2009/11/23/accepted PY - 2009/12/18/entrez PY - 2009/12/18/pubmed PY - 2010/5/11/medline SP - 340 EP - 5 JF - Colloids and surfaces. B, Biointerfaces JO - Colloids Surf B Biointerfaces VL - 76 IS - 1 N2 - Glassy carbon electrode modified with gold nanoparticles was prepared using electrodeposition at constant potential of -0.20V, and characterized with scanning electron microscopy and electrochemical techniques. Voltammetry was employed to study the electrochemical behaviors of tryptophan at the Au nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. The results showed that the Au nanoparticles modified electrode had good performance for the electrochemical oxidation of tryptophan. Compared with the unmodified electrode, the Au nanoparticles modified electrode improved the adsorption of tryptophan on the nanointerface and amplified its current response. The oxidation peak potential showed a negative shift of 50mV in the presence of sodium dodecylbenzene sulfonate indicating that the electron transfer between the electrode and bulk solution of tryptophan was facilitated. Experimental parameters for tryptophan determination, such as deposition time, pH value, and accumulation conditions have been optimized. The oxidation peak current was linearly dependent on the tryptophan concentration and a calibration curve was obtained in the concentration range of 9.0x10(-8)molL(-1) to 5.0x10(-5)molL(-1) with detection limit of 8.0x10(-8)molL(-1) (S/N=3). SN - 1873-4367 UR - https://www.unboundmedicine.com/medline/citation/20015621/Electrochemical_investigation_of_tryptophan_at_gold_nanoparticles_modified_electrode_in_the_presence_of_sodium_dodecylbenzene_sulfonate_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0927-7765(09)00599-2 DB - PRIME DP - Unbound Medicine ER -